Current mission (full-time) → Fonds Prévention Argile

FREN

Hello !
I'm Guillaume Bertrand

Senior Product Designer with a marketing background and 10+ years of experience.

Got a project? I'm a freelancer, let's talk.

See some of my work

About

I'm and I live in the French Basque Country. Over the past two years, I've worked with Beta.gouv, La Poste, EDF, Setec, Veolia and Artelia, among others.

Before I pick up my colored pencils, I take as much time as needed to understand my clients' projects and markets.

I love clarity and simplicity. And chorizo pizza.

What I bring to the table

  • Understand first. Workshops, user interviews, surveys, benchmarks: I take the time to master your business, even (and especially) when it's technical.
  • Think product, not just screens. With a marketing background and several companies founded, I challenge the value proposition, the business model and the priorities, so that design also serves your goals.
  • Design end to end. User journeys, wireframes, Figma mockups, testable prototypes and illustrations.
  • Structure the interface. Reusable components, a small library when the project calls for it, and a clean handoff to developers.
  • Help the product grow. Usage tracking, testing, iterations: a user journey is never finished on launch day.
  • Share knowledge. Training and coaching for your teams: Figma, UX methods, design best practices.

What I don't do

  • Development. I'm not a developer and I don't ship production code. I sometimes prototype quickly with the help of AI, but it's a tool to test an idea, not my job.
  • Screens without understanding the problem. If you ask me to “just do the mockups”, I'll still start by asking questions.

Work experience

  • February 2025 - present: Freelance Senior Product Designer.
    Missions: beta.gouv 🇫🇷 (Mon Devis Sans Oublis completed, and Fonds Prévention Argile since September 2025)
  • August 2019 - January 2025: Senior Product Designer & founder @charrette.club
  • August 2020 - August 2021: Product Designer & founder @artelink.com (acquired and integrated by the Artelia group in 2021)
  • Oct. 2018 - August 2019: Product Manager @Saint-Gobain DBF
  • August 2014 - Dec. 2018: founder @monmaitrecarre.com (acquired by the Saint-Gobain group in Oct. 2016)
  • Jan. 2013 - August 2014: E-marketing Manager @Boosket (f-commerce SaaS)
  • For everything else: LinkedIn

Side projects

  • App and website concept and design @La fraise (launched in 2019, no longer updated, 150k+ users)
  • Designed a few posters for @La Biche Studio Print (go have a look, they're gorgeous)
  • Logo, brand guidelines and website @Léon Voile (I hate WordPress)
  • Website design and updates for @resak.org (a great nonprofit that upcycles plastic waste) with La biche studio

Education

Passions

  • Svartpilen 401 rides across the Basque Country
  • Rolling around on my cruiser
  • Sports in general: football, running, mountain biking...
  • Cooking for friends and family (chorizo risotto champion)
  • Comics, manga, sci-fi...
  • Tinkering and trying out new tools (home automation, NAS, etc.)

Any questions? Drop me a line!

This site was handcrafted with my own little fingers using simplegrid.io and a bit of Claude, all from the Basque Country 🌶️.